* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    background: #e6eef0;
    filter: drop-shadow(0 0 5px white);
}

hr {
    margin: 10px 0 20px 0;
}

h2 {
    margin-top: 20px;
}

ul {
    margin-left: 70px;
}

dd {
    margin-left: 50px;
    margin-top: 5px;
}

li {
    margin-top: 5px;
}

h2,
hr,
dl {
    margin-left: 30px;
    position: relative;
}

.dot {
    position: absolute;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    border: 1px solid black;
    margin-left: 35px;
    margin-top: 13px;
}

.first-tip,
.second-tip {
    position: absolute;
    margin-top: -240px;
    margin-left: -90px;
    width: 5px;
    height: 5px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 5px #ff1d08;
    border-radius: 50%;
    animation: pulse 1.2s linear infinite;
}

.second-tip {
    animation-delay: 0.8s;
}

@keyframes pulse {
    0% {}
    70% {
        width: 5px;
        height: 5px;
        opacity: 1;
    }
    100% {
        width: 20px;
        height: 20px;
        opacity: 0;
    }
}

#first-page,
#second-page {
    position: absolute;
    margin-top: 10px;
    margin-left: 25%;
    font-size: 13px;
    width: 600px;
    height: 720px;
    background: rgb(255, 255, 255);
    box-shadow: 0px 0px 5px #6e6e6e;
}

.first-up {
    z-index: 1;
}

.second-down {
    z-index: 0;
    transform: rotate(7deg);
}

.gameDemo {
    display: none;
    position: absolute;
    z-index: 2;
    float: right;
    width: 100%;
    height: 765px;
    background: rgb(68, 68, 92, 0.7);
}

.demo-left {
    width: 800px;
    height: 100%;
    position: absolute;
    text-align: center;
    color: #fff;
}

.demo-left h1 {
    margin-top: 140px;
    margin-bottom: 60px;
    color: rgb(255, 255, 255);
}

.de-game {
    position: relative;
}

.de-game-one,
.de-game-tow,
.de-game-three {
    position: absolute;
    margin-left: 260px;
}

.de-game-one {
    display: block;
}

.de-game-tow {
    display: none;
}

.de-game-one h3 {
    margin-left: 30px;
}

.de-game-tow h3 {
    margin-left: 60px;
}

.de-game-one dd,
.de-game-tow dd,
.de-game-three dd {
    text-align: left;
    margin-top: 10px;
}

.de-game-three {
    display: none;
}

.start {
    position: absolute;
    margin-top: 50px;
    width: 300px;
    height: 100px;
    margin-left: -10px;
}

.startTest {
    width: 50px;
    height: 50px;
}

.first-game,
.second-game,
.third-game,
.cicle-one,
.cicle-tow,
.cicle-three {
    position: absolute;
    border: 1px solid #9797bb;
    border-radius: 100%;
}

.demo-right {
    position: relative;
    margin-top: 20px;
    float: right;
    width: 800px;
}

.first-game {
    margin-left: 250px;
    margin-top: 250px;
    width: 300px;
    height: 300px;
    background: url(../img/taidou.png) -80px;
    box-shadow: 5px 5px 10px #323236;
    z-index: -7;
    cursor: pointer;
}

.second-game {
    margin-left: 450px;
    margin-top: 50px;
    width: 200px;
    height: 200px;
    background: url(../img/run.png) 20px;
    box-shadow: 5px 5px 10px #323236;
    cursor: pointer;
}

.third-game {
    margin-left: 600px;
    margin-top: 350px;
    width: 180px;
    height: 180px;
    background: url(../img/car.png) -90px;
    box-shadow: -5px -5px 10px #323236;
    z-index: -3;
    cursor: pointer;
}

.cicle-one {
    width: 350px;
    height: 350px;
    z-index: -999;
    right: 100px;
}

.cicle-tow {
    width: 300px;
    height: 300px;
    z-index: -999;
    right: 100px;
    top: 320px;
}

.cicle-three {
    width: 320px;
    height: 320px;
    z-index: -999;
    right: 350px;
    top: 360px;
}

.solid-one {
    position: absolute;
    right: 20px;
    top: 150px;
    height: 230px;
    width: 230px;
    background: #494a64;
    border-radius: 100%;
    z-index: -2;
    box-shadow: 1px 1px 10px #323236;
}

.solid-tow {
    position: absolute;
    right: 130px;
    top: 420px;
    height: 150px;
    width: 150px;
    background: #494a64;
    border-radius: 100%;
    z-index: -6;
    box-shadow: 1px 1px 10px #323236;
}

.solid-three {
    position: absolute;
    right: 240px;
    top: 100px;
    height: 300px;
    width: 300px;
    background: #494a64;
    border-radius: 100%;
    z-index: -2;
    box-shadow: 1px 1px 10px #323236;
    z-index: -8;
}

.solid-four {
    position: absolute;
    right: 300px;
    top: 540px;
    height: 130px;
    width: 130px;
    background: #494a64;
    border-radius: 100%;
    z-index: -9;
    box-shadow: 1px 1px 10px #323236;
}

.photoDemo {
    position: absolute;
    visibility: hidden;
    width: 100%;
    z-index: 4;
}

.photoDemo section {
    position: relative;
    background-color: chocolate;
    width: 600px;
    height: 400px;
    margin: auto;
    transform: translateX(-40px);
    margin-top: 140px;
    overflow: hidden;
    filter: drop-shadow(0 0 20px white);
}

.photoDemo ul {
    position: absolute;
    top: -5px;
    left: 0px;
    width: 4000px;
    margin-left: 0%;
}

.photoDemo ul li {
    list-style: none;
    float: left;
    left: -100px;
}

.photoDemo img {
    width: 600px;
    height: 400px;
    border: 10px solid #fff;
}

.circle {
    position: absolute;
    margin-top: 360px;
    margin-left: 25px;
}

.circle li {
    width: 13px;
    height: 13px;
    border-radius: 100%;
    border: 1px solid #fff;
    float: left;
    margin-left: 5px;
    list-style-type: none;
    cursor: pointer;
}

.current {
    background: #fff;
}

.arrow-l,
.arrow-r {
    position: absolute;
    width: 30px;
    height: 40px;
    background-color: black;
    opacity: 0.3;
    z-index: 999;
    text-align: center;
    line-height: 40px;
    text-decoration: none;
    font-size: 20px;
    color: #fff;
    border-radius: 10%;
    display: none;
}

.arrow-l {
    margin-top: 180px;
    margin-left: 10px;
}

.arrow-r {
    margin-top: 180px;
    margin-left: 560px;
}